Cita APA (7a ed.)

Lysons, C. (1989). Purchasing (2nd ed.). Pitman Publishing.

Cita Chicago Style (17a ed.)

Lysons, C.K. Purchasing. 2nd ed. London: Pitman Publishing, 1989.

Cita MLA (9a ed.)

Lysons, C.K. Purchasing. 2nd ed. Pitman Publishing, 1989.